I did a little searching around and didn't find quite the info i was looking for. I'm in the market for some MMIs and see that Energy Suspension and Prothane both make them. What I haven't heard is if one is better than the other. Read good things about both. It looks like the Prothane is a solid piece whereas the ES are 2 piece. The Prothane is about 30 dollars more, but looks to be pretty stout. Any advice?

yes go with prothane. es are just inserts that try to fill in where the stock ones left out. prothane are actual replacements for the stock mounts made of urethane and are better at reducing engine movement. click on my screen name. i did a write up on the prothane install a while back

Cant find a link for you, but the washer mod is pretty self explanitory. when you take out the 4-17mm bolts to drop the crossmember and install the motor mounts you will see 4 rubber bushings. pop them out and replace them with the toughest washers you can find at the hardware store... done! I sprayed mine with undercoating after to keep them from rusting.

A little help i here! I just opened the hood today to check the oil and noticed the bolt had fallen out. Not sure how long it had been out. The bolt was lying just underneath, so I picked it up and took the wife's Altima to the hardware store and picked up a new nut and two brass flat washers and reinstalled it. No torque wrench, just twisted it snug. The OEM 2003 Nissan Altima Motor Mount appeared sound.

Car goes in to dealer Monday for service (w/ 79k miles). Anything I should specifically ask them to check, given that the upper mount had not been secure for an unknown period of time?

Wow this is the first time i heard about those prothane's that's interesting.

I belive at one point several years ago they did. If you want stiffer mounts then the polyurithane mounts from Energy Suspension you could just weld your own mounts in. However this will make the car vibrate like hell. No prolong damage as long as you ensure all bolts are torqued to the proper spec.

yea i have the es mmi's for a long time, definately feel the vibrations, but nothing like having a solid mount. only giet minimal wheel hop with the mmi's which is a big improvement over stock rubber bushings.

03b15ser - i believe the ser and specv have the same mounts both are qr25, so im 99% sure the es mmis or other mounts will also fit your 03b15ser and install is identical